Don't Clog the Arteries

You play as a cell, trapped in its host. It is time for revenge. It is time to clog the host's Heart.
But, first you must avoid getting caught on the way. Don't clog the arteries.

Avoid bacteria and red blood cells on your way to the Heart. If you collide with them, they become absorbed and you grow,
and you get closer to getting stuck to early. You can emit some of your mass though, preventing them from reaching you.